Because the airline industry is an important part in the service industry-driven and have continuously expanded. Sometimes there are great signs for business and want to move to new production base.
The aviation industry is an important part in driving the industry. And has expanded steadily in sometimes cramped and have a business need to be relocated to the new.
Because the aviation industry is an important part in driving the service industry. And has expanded gradually, sometimes in a cramped and business need to move production bases.